This document provides an overview of Voice over Internet Protocol (VoIP) through a seminar presentation covering what VoIP is, why and when to use it, how it works, its architecture and components, advantages, disadvantages, alternatives, and the future of VoIP. Key points include that VoIP allows routing of voice conversations over the internet or IP networks, it can provide cheaper telecommunications through reduced phone and wiring costs, and integrates features like video conferencing. Quality concerns and dependency on network hardware are disadvantages.

1. www.oeclib.in
Submitted By:
Odisha Electronic Control Library
Seminar
On
Voice-Over-Internet-Protocol
(VoIP)

2.  What is VOIP?
 Why use VOIP?
 When can I consider VOIP?
 PSTN vs. INTERNET
 How VoIP works
 VOIP Architecture
 Components
 Advantages
 Disadvantages
 VOIP Alternatives
 Future
 Reference

3. Routing of voice conversations over the Internet or
through any other IP-based network.

4.  Cheaper telecommunications
 Less phone line rental
 Less wiring required
 “Free” phone calls in some situations
 Video conferencing possibilities
 Branch offices may not need a PABX
 Use Wifi bridges to connect phone system

5.  When moving to a new building
 When STD calls and International calls costs need
to be reduced
 When line rental fees need review
 When new EFTPOS, fax, modems need to be added
 If call count per month is high

6. PSTN INTERNET
 Voice network use circuit
switching.
 Dedicated path between
calling and called party.
 Bandwidth reserved in
advance.
 Cost is based on distance
and time.
 Data network use packet
switching.
 No dedicated path
between sender and
receiver.
 t acquires and releases
bandwidth, as it needed.
 Cost is not based on
distance and time.

9.  VoIP Protocols
 VoIP Gateway
 VoIP Codecs

10.  Most good quality VOIP software is either cheap or free.
 Free or cheap local/international call rates compared to
traditional phone calls.
 VOIP is integrated with features such as chat, whiteboard,
audio and video-conferencing.
 Can be used with VOIP adapters, allowing your normal
home phone to be turned into a VOIP phone.
 VOIP phone adapters can be carried around with you
wherever you travel.
 Computers do not have to be turned on, you can receive
VOIP calls on your existing phone.

11.  Quality of calls across Internet is not assured
 Broadband equivalent connection needed for
connecting offsite
 Network switches may need replacement
 Power on Ethernet may need to be established over
the LAN
 Phone availability is dependant on network
hardware and power
 Some VOIP providers have fees
 Emergency calls 000 do not issue an origin

12.  Call cap plans with Telecommunications provider
 Virtual fax lines that get sent to email
 ISDN D channel for EFTPOS
 Advanced forms of Instant messaging
 Use mobile phones and reduce land lines
 Least cost routing with various carrier prefixes

13.  Mobile phone that can do Wifi VOIP if in range
 VOIP using Wimax (no phone lines required)
 Internet / VOIP / Video on demand broadband
 ISP’s working like carriers with Quality of Service
for VOIP on their network
 Wireless phones with Skype built in (2006 Q3)

14.  www.google.com
 www.wikipedia.com

15. Thanks